Just to make sure you are meaning that the temperature is in Degrees Celsius, right?
That's A LOT! My mate just blew his video card on a MacBook Pro and it cost him 700 pounds to replace. Luckly he had extended warranty.
You might want to try to make sure you machine has plenty of air flow. Lift the laptop of the table by putting a small box under one side, or use a stand...
I have an 20" iMac and the graphics card was arround 79 Celsius when watching movies, by just opening the window in my small room, the temperature went down 10 degrees!
Best of luck!
Plucky
PS: I am new to the mac world as well, and I didn't know Macs have problems with heating up... but aparently its quite bad!